Surface heat transfer characteristics during transient cryogen spray cooling

TIAN Jiameng; CHEN Bin; LI Dong; ZHOU Zhifu

doi:10.11949/j.issn.0438-1157.20160509

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Surface heat transfer characteristics during transient cryogen spray cooling

更新时间：2025-11-26

- Surface heat transfer characteristics during transient cryogen spray cooling
- CIESC Journal Vol. 67, Issue 10, Pages: 4064-4071(2016)
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160509
  CLC： K124
- Online First：05 October 2016，
  
  Published：05 October 2016
- 稿件说明：
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TIAN Jiameng, CHEN Bin, LI Dong, et al. Surface heat transfer characteristics during transient cryogen spray cooling[J]. CIESC Journal, 2016, 67(10): 4064-4071.
DOI：

TIAN Jiameng, CHEN Bin, LI Dong, et al. Surface heat transfer characteristics during transient cryogen spray cooling[J]. CIESC Journal, 2016, 67(10): 4064-4071. DOI： 10.11949/j.issn.0438-1157.20160509.

摘要

喷雾冷却在工业工程中应用广泛，其表面相变传热过程非常复杂，需要开展深入研究揭示其机理与规律。以R134a、R407C及R404A制冷剂为工质开展瞬态喷雾冷却表面相变传热特性实验研究，提出了表征冷却表面内部导热阻力与喷雾表面对流传热阻力之比的喷雾Biot数，以及表征瞬态喷雾冷却最大热通量及其出现时刻的量纲1 Reynolds数Rel和Fourier数Fol。将Jakob数Ja与Rel及液滴Weber数We关联，提出了最大热通量及其出现时刻的通用量纲1关联式。发现不同制冷剂的瞬态喷雾冷却过程具有相似性，得到了热通量随时间变化的量纲1关联式。利用上述关联式对喷雾表面瞬态温度进行模拟，结果与实验结果吻合较好，证明了关联式的准确性。

Abstract

Spray cooling is widely used in industry. Complicated surface heat transfer characteristics are needed to reveal the mechanism. In this work

the surface heat transfer experiments of cryogen spray cooling (CSC) with R134a

R407C and R404A were conducted. The spray Biot number was defined to represent the ratio between the internal thermal resistance of substrate and the resistance of surface convective heat transfer. Dimensionless Reynolds number Rel and Fourier number Fol were proposed to represent the maximum heat flux and the corresponding time

respectively. By coupling Jakob number with Rel number and droplet Weber number (We)

dimensionless correlations of maximum heat flux and the corresponding time were constructed. The similarity of the transient spray cooling process with different cryogens was found and the dimensionless correlation of time-dependent heat flux was obtained. By using these correlations

the simulated transient surface temperature during cryogen spray cooling agreed well with the experiment data

which proved the accuracy of the correlations.

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